Surely it makes more sense if you use his, rather than each of you having one.
These things should be community holdings like 3D printers - you supply the consumables as you use them and share the initial cost. Like a "Men's Shed" (albeit we should not discriminate ). Of course, only people with the necessary competencies should be allowed to use them.
I seem to recall from another discussion, that the CO2 lasers actually last longer being used regularly.